Portable packoff tool for tubing



Jan. 1, 1952 H. MEYER PORTABLE PACKOFF TOOL FOR TUBING Filed July 6, 1948 IN V EN TOR. Adam/w Mira? Patented Jan. 1, 1952 UNITED STATES PATENT OFFICE PORTABLE PACKOFF TOOL FOR TUBING Herman Meyer, Long Beach, Calif.

Application July 6, 1948, Serial No. 37,248

4 Claims. 1

In production of an oil well, the production tubing is removed and reinserted in the well at intervals, and during this movement of the tubing, oil frequently flows out of the upper and onto the derrick floor due to gas pressure within the well. The spilling of oil onto the derrick floor and the workman is both uncomfortable and dangerous, and an object of my invention is to provide a novel means of sealing or packing oil the upper end of the tubing while it is being moved in the well, and thus preventing the spilling of oil out of the top of the tubing.

Another object of my invention is to provide a novel packoff tool which is supported on the hook, and therefore moves upwardly and downwardly with the tubing as this tubing is moved.

Another object of my invention is to provide a novel portable packofi tool for tubing, which can be quickly and easily set onto the top oi! the tubing, and will seal or pack off the upper end of the tubing to prevent oil from spilling onto the floor of the derrick.

Another object of my invention is to provide a tool of the character stated which will not interfere with the tubing elevator, and further, which can be adjusted vertically so as to positively engage and pack ofi the upper end of the tubing. I

Other objects, advantages and features of invention may appear from the accompanying drawing, the subjoined detailed description and the appended claims.

In the drawing- Figure l is a side elevation of my tool in position on the upper end of the tubing.

Figure 2 is a fragmentary longitudinal, sectional view of my packoif tool.

Referring more particularly to the drawing, all pipe or tubing is moved into or out of a well by means of blocks from which a. hook I, depends. The elevator 2, is supported from the hook I, on links 3, 3. The elevator 2, engages the bottom of the coupling or sleeve 4, of the tubing 5, all of which is usual and well known in the art.

To pack of! or seal the open upper end of the couplingl, I provide a packoff tool Ii, which includes a block I; an eye 8, rises from the block I, and is engaged by the hook I, substantially as shown in Figure 1. The eye 8, may be threaded into the block 1, or it may be an integral part of this block. Depending from the block I, is a coarse threaded pin 9. This pin screws into a cylinder, I I]. The threads in the cylinder Ill, which receive the pin 9, are cut with sufficient tolerance so that the pin 9, will readily move in these threads. A sleeve I2 is rotatably mounted on the cylinder III, and depends from this cylinder. Suitable anti-friction bearings I3, are provided between the cylinder Ill, and the sleeve A packing I4, is mounted in the lower end of the sleeve I2, and presses tightly against the sides of the coupling 4, thus sealing ofi the upper end of this coupling to prevent oil from spilling out of the top of the tubing 5. A pet cock I5, may be provided in the sleeve I2, this pet cock enabling the operator to determine if there is gas pressure in the chamber I6, within the sleeve I2. Oil will very likely follow, and proper precautions are taken to prevent spilling of the oil onto the derrick.

In operation the elevator 2, is first engaged with the pipe 5, and the elevator engages the bottom of the collar 4. The cylinder I0, is now rotated briefly by hand, and will move downwardly on the threads of the pin 9. This downward movement continues until the packing I4, is pressed tightly around the top of the coupling 4. The parts will then all be held in the position shown in Figure 1, with the top of the tubing packed off and the tubing is now raised or lowered as desired, by the operator.

To remove the elevator 2, the cylinder III, is again threaded upwardly on the pin 9, thus relieving the pressure of the packing against the coupling 4, and thereafter the elevator can be released so that another stand of tubing can be added or unscrewed as may be desired.

Having described my invention, I claim:

1. In combination with a hook and an elevator, a portable packofi tool for tubing and the like,

comprising a block, means supporting said block on the hook, a cylinder, a threaded pin depending from said block and threaded into said cylinder, a sleeve engageable with the tubing and mounted on said cylinder said cylinder being movable vertically on said pin.

2. In combination with a hook and elevator, a portable packofi tool for tubing and the like, comprising a block, means on the block engageable by the hook to support said block, a, threaded pin depending from the block, a cylinder into which said pin is threaded, a sleeve, means rotatably mounting said sleeve on the cylinder, and a packing in the sleeve engaging the tubing, the elevator engaging the tubing to support the same.

3. In combination with a hook and elevator, a portable packoff tool for tubing and the like, comprising a block, means on the block engageable by the hook to support said block, a threaded pin depending from the block, a cylinder into which said pin is threaded, a sleeve, and an antifriction bearing between the sleeve and the cylinder to rotatably mount said sleeve on the cylinder, and a, packing in the sleeve engaging the tubing, the elevator engaging the tubing to support the same.

4. In combination with a hook, and elevator and links extending from the hook to the elevator, a portable packofi tool for tubing and the 10 like comprising a block, means on the block engageable by the hook to support said block, a sleeve arranged below the block, packing means in the sleeve engageable with the tubing, and

elongatable means connecting the block and the 15 2,027,734

sleeve, said block enlongatable means and sleeve being arranged between the links and between the'hook and the elevator, said elevator engaging the tubing to support the same.

HERMAN MEYER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,664,593 Coffman Apr. 3, 1928 1,835,418 McHardy Dec. 8, 1931 Johnson -1 Jan. 14, 1936 

